cpu-reduction

95 / 100 · Low risk

Fine to try. Some of what it can do is expected: a coding skill usually runs build and test commands.

By nubjs/nub (GitHub) · coding · 4,439 stars · scanned at commit 9b73456

Diagnose and clear CPU, memory, and disk contention on the maintainer's dev host. Invoke when the machine is slow, load or swap is high, disk is filling, a Rust build hangs on a target lock, a benchmark needs a quiet host, stale worktree targets have accumulated, or orphaned build/test processes are suspected. Covers safe worktree-target cleanup, detached Rust builds, orphaned Node tests and synthetic load generators, the preserve list, and the measure-to-verify loop. For preventing orphan buil…

Works with any agent that supports SKILL.md skills.

What this skill can do

Runs commands on your computer

The author does not mention this. Expected for a coding skill.

Found in 16 places.

.claude/skills/cpu-reduction/SKILL.md, line 33uptime # load; the 1-min figure LAGS — see §7
.claude/skills/cpu-reduction/SKILL.md, line 50ps -Ao pid,ppid,%cpu,etime,command | grep -Ei 'rustc|cargo|ld64|lld|cc1' | grep -v grep
.claude/skills/cpu-reduction/SKILL.md, line 62python3 .claude/skills/cpu-reduction/scripts/clean-worktree-targets.py

Show 13 more

.claude/skills/cpu-reduction/SKILL.md, line 95df -h /System/Volumes/Data
.claude/skills/cpu-reduction/SKILL.md, line 109ps -Ao pid=,ppid=,%cpu=,etime=,comm= | awk '$2==1 && $3>20 && $5=="/bin/zsh"'
.claude/skills/cpu-reduction/SKILL.md, line 114Consecutive PIDs + identical start second + `PPID=1` + no children + a spinning loop in the argv = safe to `kill -9`. **Read the full argv first** — an agent's
.claude/skills/cpu-reduction/SKILL.md, line 121LOADPIDS=$(jobs -p)
.claude/skills/cpu-reduction/SKILL.md, line 131ps -Ao pid=,ppid=,%cpu=,rss=,etime=,command= | awk '$2==1' \
.claude/skills/cpu-reduction/SKILL.md, line 146sample <pid> 3 -mayDie # writes /tmp/<comm>_<ts>.sample.txt
.claude/skills/cpu-reduction/SKILL.md, line 182uptime; sysctl -n vm.swapusage; df -h ~/.cache; ps -Ao pid,%cpu,%mem,etime,comm -r | head -8
.claude/skills/cpu-reduction/scripts/clean-worktree-targets.py, line 18result = subprocess.run(
.claude/skills/cpu-reduction/scripts/clean-worktree-targets.py, line 22stdout=subprocess.PIPE,
.claude/skills/cpu-reduction/scripts/clean-worktree-targets.py, line 23stderr=subprocess.PIPE,
.claude/skills/cpu-reduction/scripts/clean-worktree-targets.py, line 65result = subprocess.run(
.claude/skills/cpu-reduction/scripts/clean-worktree-targets.py, line 68stdout=subprocess.PIPE,
.claude/skills/cpu-reduction/scripts/clean-worktree-targets.py, line 69stderr=subprocess.PIPE,

Install

Paste this into your terminal. It downloads exactly the version we scanned, not whatever is newest.

if [ -e ~/.agents/skills/'cpu-reduction' ] || [ -L ~/.agents/skills/'cpu-reduction' ]; then echo 'A skill folder named cpu-reduction already exists — not replacing it' >&2; false; else d=$(mktemp -d) && git clone --quiet --filter=blob:none --no-checkout 'https://github.com/nubjs/nub' "$d" && git -C "$d" checkout --quiet '9b734566fd36ceed8379f67a92291bc68af60801' -- '.claude/skills/cpu-reduction' && mkdir -p ~/.agents/skills && cp -R "$d"/'.claude/skills/cpu-reduction' ~/.agents/skills/'cpu-reduction' && rm -rf "$d"; fi

Codex reads ~/.agents/skills directly. For Claude Code, Cursor, Copilot, Gemini CLI, Antigravity or OpenCode, also link it. For Claude Code: ln -s ~/.agents/skills/'cpu-reduction' ~/.claude/skills/'cpu-reduction' (other agents: ~/.cursor/skills, ~/.copilot/skills, ~/.gemini/skills, ~/.gemini/config/skills, ~/.config/opencode/skills). Or install through the finder skill, which does both.

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Score history

Date	Version	Score
2026-11-11	`9b73456`	95
2026-11-08	`719c617`	95
2026-11-07	`742e698`	95